blackfin RTC driver: Fix bug Only RTC interrupt can wake up deeper sl…

…eep core

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-bfin.c

@@ -430,13 +430,41 @@ static int __devexit bfin_rtc_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int bfin_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+#ifdef PM_WAKEUP_SIC_IWR
+	struct bfin_rtc *rtc = dev_get_drvdata(&pdev->dev);
+#endif
+	bfin_rtc_reset(&pdev->dev);
+#ifdef PM_WAKEUP_SIC_IWR
+	bfin_write_RTC_SWCNT(10);
+	bfin_rtc_int_set(rtc, RTC_ISTAT_STOPWATCH);
+#endif
+	return 0;
+}
+
+static int bfin_rtc_resume(struct platform_device *pdev)
+{
+#ifdef PM_WAKEUP_SIC_IWR
+	struct bfin_rtc *rtc = dev_get_drvdata(&pdev->dev);
+	bfin_rtc_int_clear(rtc, RTC_ISTAT_STOPWATCH);
+#endif
+	return 0;
+}
+#endif
+
 static struct platform_driver bfin_rtc_driver = {
 	.driver		= {
 		.name	= "rtc-bfin",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= bfin_rtc_probe,
 	.remove		= __devexit_p(bfin_rtc_remove),
+#ifdef CONFIG_PM
+	.suspend	= bfin_rtc_suspend,
+	.resume		= bfin_rtc_resume,
+#endif
 };
 
 static int __init bfin_rtc_init(void)